Inkstand



.(No Model.)

C. F. MASON.`

INKSTAND.

Patented June 7,` 1892.

v figa UNITED STATESN PATENT OFFICE.

CHARLES F. MASON, OF AKRON, OHIO.

INKSTAND.

' SPECIFICATION forming part of Letters Patent No. 476,288, dated June 7, 1892.

Application filed March 11,1892. Serial No. 424,537. (No model.) l

To @ZZ whom it may concern:

Be it known that I, CHARLES F. MASON, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Inkstands, of which the following is a specication.

My invention has relation to improvements in that class of inkstands in which the ink is contained in a closed well and caused to rise in a dipping-tube by pneumatic pressure exerted by the compression of a flexible diaphragm moved by and simultaneously with the depression of the dip-tube.

The objects of my invention are to provide a new and improved diaphragm which shall constitute a cork for the ink-well, to enable the movable parts to be readily removed to permit the well to be filled and the parts cleaned, to provide an automatic vent to prevent the ink risingin the tube under any compression of air in the well except that caused by the depression of said tube, and generally to simplify the construction and reduce the number of parts.

To the aforesaid objects my invention consists in the peculiar and novel construction, arrangement, and combination of parts hereinafter described, and then specifically pointed out in the claims, reference being had to the accompanying drawings, forming a part of this specification.

In the accompanying drawings, in which similar reference-numerals indicate like parts in the several views, Figure l is an elevation of my improved inkstand; Fig. 2, a central vertical section of the hard-rubber cap and dip-tube and the soft-rubber diaphragm; Fig. 3, a plan of the diaphragm, and Fig. 4 a section at the line 00 of Fig. 2 and an inverted plan of the dip-tube.

Referring to the drawings, l is the well, of glass or other preferred material, having an inner cup-shaped opening, about the top of which is an annular iiange 2, preferably slightly tapering on the inner edge to receive the tapering parts of the diaphragm hereinafter described. Above this flange 2 is a conical cap 3, of hard rubber, having a radial flange 4; to rest on the flange 2 and an inner depending annular flange 5, slightly tapering downward, and through the center an orifice for the dip-tube 6.

Surrounding and snugly fitting the flange 5 is a ring 7, of soft rubber, thickest at its upper edge and slightly tapering toward the bottom and of such size as to snugly fit and close the interior of the flange 2, thereby constituting a cork for the ink-well, and extending across and integral with the ring is the elastic inverted-saucer-shaped diaphragm 8, having a central orifice for the dip-tube 6, about which is the annular ridge 9. The diptube 6, of hard rubber, has a funnel-shaped top, below which it is cylindrical to fit and slide in the cap 3. Thence it is reduced by a square shoulderto a size slightly less than the interior of the annular ridge 9, and below is again reduced to a size slightly less than the orifice in the diaphragm 8, and at a distance below this, slightly exceeding the thickness of the diaphragm, it is abruptly enlarged, whence it tapers to a pipe of suitable size and a length to nearly reach the bottom of the well. The first reduced portion of the diptube is cut away on two sides to the width'of the second or smaller part (see Fig. 4) and for a purpose to be stated.

In 'use the dip-tube is inserted in the opening in the diaphragm luntil the latter incloses it at the smallest part'between the shoulders, whereby it is retained. The cap is inserted in the ring 7 of the diaphragm and the latter forced into the flange 2 or neck of the well.

The dip-tube 6 is supported by a diaphragm S, its first shoulder resting on and making by its weight an air-tight joint therewith. By pressing the tube down the air in the well is compressed and the ink rises in the tube in the usual manner. The well is filled by removing the cap 3 and connected parts.

If the air in the Well is compressed by any cause other than forcing down the dip-tube, as by expansion from heat or replacing the Atop after filling, the ink will not be forced up through the dip-tube, as occurs in many inkstands of this class, but the tube itself will be slightly raised by the pressure and allow the air to pass at the flattened sides of the first reduced portion and escape between the ridge 9 and first shoulder. If the stand becomes overturned, the lower shoulder gravitates IOO against the under face of the diaphragm and the escape of ink is prevented.

I claim as my invention- 1. In an inkstand of the class specified, the combination, With the ink-Well, ot' the rigid cap having the radial and annular Aflanges and a central opening, and the inverted-saucershaped diaphragm having a central opening and an annular ridge about said opening and at its outer edge al ring to fit the inside of the ink-well opening and the outside of the annular liange of the cap, and the dip-tube arranged to enter and slide in said cap, having a shoulder to rest on the edge of the diaphragm and a reduced portion to be inclosed by said diaphragm, substantially as shown and described, and for the purpose speciiied.

2. In an inkstand of the class speciiied,the ink-Well and the rigid cap having a central opening for the dip-tube, and the dip-tube arranged to iit the central opening in the cap and having a'redueed portion to enter the diaphragm, combined With a Semi-spherical elastic diaphragm having a central opening to receive the dip-tube and an upwardly-extending ringintegral therewith and arranged to rest between the cap and the interior of the ink-well, substantially as shown and described, and for the purpose specified.

3. In an inkstand of the kind specitied, the combination, with an elastic inverted-saucershaped diaphragm having a central orifice for the dip-tube andan annular ridge on the upper face of said diaphragm surrounding said orifice and a short distance therefrom, of a dip-tube having a reduced portion to rest in said central orilice and having shoulders on opposite sides thereof, the upper shoulder bcing partially cut away, and a larger shoulder above said upper shoulder adapted to rest on said annular ridge, substantially as shown and described.

In testmon y that I claim the above I hereunto set my hand.

CHARLES F. MASON.

In presence of- C. P. HUMPHREY, C. E. HUMPHREY. 

